[PD] processing images with GEM?
ricardopalmieri at gmail.com
Thu Jun 5 05:52:47 CEST 2008
2008/1/21 IOhannes m zmoelnig <zmoelnig at iem.at>:
> Derek Holzer wrote:
>> Hi IOhannes,
>> IOhannes m zmoelnig wrote:
>>> the problem is, that some pix-sources (platform dependent!) supply the
>>> images with (0/0) in the upper-left corner, whereas others (0/0) is
>>> the lower-left corner (like openGL expects it).
>> Would be good to know which platforms do it right, and which ones wrong.
> it's not a matter of "right" and "wrong".
> mathematicians tend to put the origin in the lower-left corner (like a
> coordinate system)
> computer-graphics prefer the upper-left corner (back in the old days,
> the cursor would appear in the 1st line on the screen)
> openGL has been designed by mathematicians.
> tcl/tk comes from the computer geeks...
> btw, this fuzz is the reason why the tables in Pd are never oriented the
> right way...
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